Perhaps you should try some spelling variations:
dualen studium » duales studium
duale studium » duales studium, das studium
da filosofica » da filosofia, vida filosofica, la filosofia
da literatura » la literatura, de literatura, na literatura
a literatura » la literatura, a literature, y literatura

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: testo ((dualen studium) OR (duale studium)) da filosofica ((da literatura) OR (a literatura))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "testo ((dualen studium) or (duale studium)) da filosofica ((da literatura) OR (a literatura))*".